This document describes Kingston's KHX6400S2LLK2/4G product, which is a kit of two 2GB CL5 low latency SDRAM 2Rx8 memory modules. Each module is based on sixteen 128M x 8-bit DDR2 FBGA components. The total capacity is 4GB. The SPDs are programmed to JEDEC low latency timing of 5-5-5-18 at 1.8V. Each 200-pin SODIMM uses gold contact fingers and requires +1.8V.
Kingston's KHX6400S2LLK2/4G kit consists of two 2 GB low‑latency DDR2 SODIMM modules (PC2‑6400, CL5) designed for 200‑pin sockets. Each module uses sixteen 128M × 8‑bit DDR2 FBGA components and operates at a single 1.8 V supply.
Key specifications include a 4 GB total capacity, 2.5 ns minimum clock cycle time, JEDEC timing of 5‑5‑5‑18, operating temperature from 0 °C to 55 °C, and a module height of 30 mm. The datasheet also provides electrical, mechanical, and feature details such as bidirectional data strobe, DLL alignment, and programmable burst lengths.
| Total Capacity | 4 GB (2 GB × 2) |
|---|---|
| Memory Type | DDR2 SDRAM (PC2‑6400) CL5 200‑Pin SODIMM |
| Supply Voltage | +1.8 V (+4/‑0.1 V) |
| Timing | 5‑5‑5‑18 at 1.8 V |
| Clock Cycle Time (tCK) | 2.5 ns min / 8 ns max |
| Row Cycle Time (tRCmin) | 57.5 ns min |
| Row Active Time (tRASmin) | 45 ns min / 70,000 ns max |
| Refresh to Active/Refresh | 127.5 ns min |
| Operating Temperature | 0 °C to 55 °C |
| Storage Temperature | -58 °C to +125 °C |
| Module Height | 30.00 mm |
The kit provides a total capacity of 4 GB, made up of two 2 GB modules.
It operates from a single 1.8 V supply with a tolerance of +4 V/‑0.1 V.
The timing is JEDEC 5‑5‑5‑18 at a 1.8 V supply.
They are rated for operation from 0 °C up to 55 °C.